When I add slow motion, and then save the movie as DV Avi, or Avi, the outcome on any area with slow motion applied, becomes all bouncy and shaky all over the place. Is there something I'm doing or not doing? Is there anything I can do to stop this happening??

This is with using footage captured via a DV Camera btw, just incase that info matters.

Any help on this would be much appreciated, because its an annoying and stupid problem to get.